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More Information
Mfg SKU #202-5979
Tool Holder CategoryCollet Chuck
BrandShars Tool
shank sizeHSK63A
projection length3.93
max rpm balanced toG2.5 30000
TIR (inch)0.0001
drawbar thread size5/8x11UNC
Dual Contact Tool HolderYes
collet seriesER32
collet chuck stylestandard
collet nut diameter1.97


  • Dynamically balanced to G2.5 30,000 RPM to meet today's demanding need in aggressive high speed machining

  • In a generic standard ER collet nut, an internal ring is off-centered so that an ER collet can be easily snapped into it and holds the ER collet in place. To minimize this off-centering, SHARS ER collet nut is optimized to distribute the flat sides' area to off-set the off-center. ER collet nut is also balanced with each holder

  • Made from alloy steel harden to 54-60 HRc
  • All critical surface are precision ground

  • Concentricity is less than 0.0001" from taper to end mill pocket
  • Each holder comes with a lab certificate on its taper accuracy and runout measurement

  • Coolant through capability